evelync12
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#1
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#1
heres the question:
Atrazine binds to proteins in the electron transfer chain in chloroplasts of weeds, reducing the transfer of electrons down the chain.
Explain how this reduces the rate of photosynthesis in weeds.

heres the mark scheme:
1. Reduced transfer of protons across thylakoid membrane
OR
Reduced chemiosomotic gradient/proton gradient across thylakoid membrane;
2. (So) less ATP produced;
3. (So) less reduced NADP produced;
4. (So) light-independent reaction slows/stops
OR
Less reduction of GP to triose phosphate

my issue is point number 2 (2. (So) less ATP produced) how does this relate to point number 3 (3. (So) less reduced NADP produced) like how does less ATP produced mean less reduced NADP????
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kekedoyouloveme?
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because the NADP accept electrons and hydrogens to form Reduced NADP, these hydrogens can only move, linked to ATP because if ATP is made it means that the hydrogens have successfully also move through the ATP synthetase enzyme, that makes ATP and the hydrogens then get picked up by the NADP to form reduced NADP.. might be wrong but check x
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mgi
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(Original post by evelync12)
heres the question:
Atrazine binds to proteins in the electron transfer chain in chloroplasts of weeds, reducing the transfer of electrons down the chain.
Explain how this reduces the rate of photosynthesis in weeds.

heres the mark scheme:
1. Reduced transfer of protons across thylakoid membrane
OR
Reduced chemiosomotic gradient/proton gradient across thylakoid membrane;
2. (So) less ATP produced;
3. (So) less reduced NADP produced;
4. (So) light-independent reaction slows/stops
OR
Less reduction of GP to triose phosphate

my issue is point number 2 (2. (So) less ATP produced) how does this relate to point number 3 (3. (So) less reduced NADP produced) like how does less ATP produced mean less reduced NADP????
No, go back to the chemical pathways and photosystems.
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evelync12
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obviously i did, i still dont understand
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evelync12
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(Original post by mgi)
No, go back to the chemical pathways and photosystems.
obviously i did i still dont understand
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tocka90
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#6
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Watch this https://youtu.be/o12ETiAh39Y

Atp and nadph are products of light dependent reaction
Nadph is made by accepting electrons and hydrogens from etc
Atp is made thanks to H+ passing through ATP syntase, H+ changing shape of ATP synthase allowing it to make ATP from ADP and Pi
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